**4.3 Effect of digestate on soil microelement**

After the application of the digestate in 5 and 10 L ha-1 dosages, the Cd, Co, Cu, Ni and Sr content of soil solutions did not change. The Zn content decreased significantly, while the amount of manganese (Mn) increased by almost 40% (Vágó et al., 2009) (Table 5).


Table 5. Microelement content of soil samples (mg kg-1) treated with liquid digestate (extraction with 0.01 M dm-3 CaCO3). (*Data from Vágó et al., 2009*).

The increasing soluble P content of digestate treated soil decreased the available Zn content in the soil solution by building slightly soluble zinc-phosphate residue (Vágó et al., 2009).
